LaGrange Lock and Dam
Illinois — Brown County — ILLINOIS RIVER
Location
| State | Illinois |
| County | Brown |
| River | ILLINOIS RIVER |
| Coordinates | 39.94040, -90.53430 |
Physical Characteristics
| NID Height | 21 ft |
| Dam Height | — |
| Dam Length | 676 ft |
| NID Storage | 55,000 acre-ft |
| Max Storage | 55,000 acre-ft |
| Surface Area | 0 acres |
Safety Classification
| Hazard Potential | Significant |
| Condition Assessment | Not Available |
| EAP Status | Yes |
| Last Inspection | July 7, 2022 |
| Inspection Frequency | 5 |
Dam Information
| Year Completed | 1939 |
| Primary Purpose | Navigation |
| Dam Type | Concrete |
| Owner Type | Federal |
| Owner | USACE - Rock Island District |
| Other Name | LaGrange Pool |
Location Map
About This Dam Record
Dam safety data is maintained by the Army Corps of Engineers National Inventory of Dams (NID). High-hazard dams are those where failure could cause loss of life or major property damage downstream.